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s344n2d4d5 [400]
3 years ago
15

C. Complete the following combustion reaction. Write your balanced equation two different ways.

Chemistry
1 answer:
Drupady [299]3 years ago
6 0
<h3><u>Required </u><u>Answer</u><u>:</u></h3>

The substance in reactants side shows a alkane which is burnt. As a result of combustion, Carbon dioxide and water is formed.

The equation will be like this:

\rm{ C_8H_18 +  \dfrac{25}{2}  O_2 =8 CO_2 + 9 H_2O }

Now here we can see that the stoichiometric coefficient is a fraction, hence Multiplying 2 in both sides of the eq.

\rm{2 C_8H_18 + 25 O_2 = 16 CO_2 + 18 H_2O }

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The ka value for acetic acid, ch3cooh(aq), is 1.8× 10–5. calculate the ph of a 1.60 m acetic acid solution.
leonid [27]

<span>To determine the pH of the solution given, we make use of the acid equilibrium constant (Ka) given. It is the ratio of the equilibrium concentrations of the dissociated ions and the acid. The dissociation reaction of the CH3COOH acid would be as follows:

</span>CH3COOH = CH3COO- + H+<span>

The acid equilibrum constant would be expressed as follows:

Ka = [H+][</span>CH3COO-] / [CH3COOH] = 1.8× 10^–5

<span>
To determine the equilibrium concentrations we use the ICE table,
         CH3COOH             H+             </span>CH3COO<span>-
I            1.60                    0                     0
C             -x                    +x                   +x
----------------------------------------------------------------
E         1.60-x                   x                     x 

</span>1.8× 10^–5 =  [H+][CH3COO-] / [CH3COOH] <span>
1.8 x 10^-5 = [x][x] / [0.160-x] </span>

Solving for x,

x = 1.69x10^-3 = [H+] = [F-]

pH = -log [H+] = -log [1.69x10^-3] = 2.8

8 0
3 years ago
How many grams of potassium chloride will be needed to produce<br> 829 grams of zinc chloride?
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Answer:

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6 0
3 years ago
Tổng số hạt e, p, n của nguyên tử M là 40, số hạt mang điện hơn số hạt không mang điện
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Answer:

huh I can't understand

Explanation:

what are your language bro

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